I've been looking into purchasing an Ep3 lately because a) they're decently priced and b) they get good gas mileage in stock form. I'd like to get some all motor ponies out of it, and I was curious if you can throw on a dc5R head or Tsx Head without much trouble? Is it cost / power effective? What kind of numbers are you guys seeing by just building the stock ep3 motor? I am a noob so slap me if stupidity permits. Thank you.

 

Do a search for K series....and do bear in mind that the Si motor is QUITE different from the RSX-S and JDM Type R motors. Far less responsive to tuning.